Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75ccee5f4b7183ad1c8865e9d8b07ad36f719d22008605a277492d4e77d4c160' 
  AND token = 'ru/RE9zX7vhX/Kuxdrr2KFVAf4fk6hSjf4P83upmJRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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