Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f37257872a82a9785d27e54cba8727ef8b4e1cd1a8e19391d0ed1e8a2c0aca54' 
  AND token = 'CBVndR1kyzfErvqt7ddwoarG/b2LiWZGzGFC3vaHWNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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