Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2044cda787c59d865e83e08e6d3687e120a5984a9b3e7137b437607c594ba253' 
  AND token = '/uH4iVAa0s7cXjP+X4gOa0xWTx+uKsRCcKHzilD/+G8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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