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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60084cdcaf8742d709df4f163d82e412389364a19ac9f39d4b5cc2bd7e617bfa' 
  AND token = 'CE9KLQXkeQCrAcwzSoC3PtaEmZhv373CELSCnELtOcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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