Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd34e45553422bc2c9ecb50d89d892cb74ca3b5bf5aff59fefebba48e44da7949' 
  AND token = 'IowL7rM15WoDCT014aP3vPBZQ7Na4Fvt9qsXl03EXkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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