Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef610eec02511bf03dd81a24ed5b82200f1bb189a27ec2b7c58044bae528af1c' 
  AND token = 'vvRcinJclQA1AfSSVM+WyvC0KC2qUyVeJfV028hs3+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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