Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a782fa915cbd4d9a88f6ce75e4326125a63087be98ad3cbaeeb2117f530778ff' 
  AND token = '4Txk5uzMIqW3WobiFC3cKK1JefukSbv51zrdBZtlaoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}