Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '206a6e146220ae8e0ecc23194107febc15fd292704a2bb7f6743e018ebe0c061' 
  AND token = 'w44V2hJyQ7SzKAg34llen1MNrdajrwRi7HjCo9y3lAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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