Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51104d5ed50dc4ca5a024983e7d848113d9c57258785fad9a1922fef79cc331e' 
  AND token = 'ytNdaqS7jvzXQj1Ka2QD4QmXX0EGb8M36noCp3Qb1+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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