Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1d3230e54b35a4d8b082c8a2d780b9d940544e807a223c83b09a98431dfb78c' 
  AND token = 'HGfZMiXTY9LnGdChITV+/Y6yg4CiopOq3AckxeEY3lg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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