Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd223b42b2885ee280cd1bb2d6c34919e1d9c4238ce021c28b3e575febd0b405b' 
  AND token = 'ME31CqfE/fI4W7/9amYnL5v6esP2i3OjvFBnUcFVS3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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