Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5575d1e187ca3e16a4b2cff34944fba64fa7839418aee6bddbc6b5c5c2109d5' 
  AND token = 'HBNkWyReK549TGwHd9scttuFg+C+lFR4OmfOUxwPeh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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