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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ede6ca1592f3fcd378bfd82ff5757fd74b62344e28e29ea5d7d98a2be31f60be' 
  AND token = 'fx7q01Jjw/bCs9A97z4N3zSCHVQ5i779g5BEPog845M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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