Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70dc633ca694aaea18820b256da906b179e8b5d82edeef7233b55620d906b28e' 
  AND token = 'fnzNZ4M+dctispD0rbu06wIdGeLqVkcvE+myT9DQwmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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