Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19fa590de1963d66667bab5f5e779c052034b8fc12ef8c365614d7d5a3d6b3e1' 
  AND token = 'q9T6jam8ej1khsu+RI248aOjFKLnn6NtWBvM80WedRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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