Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '888c10489336383567e91d5973c128b03537f1f0f266b58fe70e4654d63996f1' 
  AND token = 'rLNOJ5krISycMxXrpfPEk71QDKsq8+v/lgCbXMPLuS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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