Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9cc8c576a7134e063923abdbf1bae68920d3cca3923d00022af54e98255eb7c' 
  AND token = 'PoYeE34xj3+dmEO1s61Ts1rNh9SqfDquq8ydMrCYuvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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