Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9424d3a1fc429992bbb6d2a94a3b514746754987d85d263e6d94845259d8c380' 
  AND token = 'l6DWbQa4ST7/lin5s7MVc1hBAk0y7GrytMALOowHNp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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