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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c29d9dccb65627addb797f85df2fc0882f3a8a9007146d13685f54fa3c4ea0e3' 
  AND token = 'Gyuye+fISPpXNkptWeEjQtAG8abm02b1qrK63+O4woE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}