Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c39f2557ab8b0abbd3364b3a23dd1cde7466315424bdd6c031535cbb06e6ab43' 
  AND token = 'rHec95AUCPYK/Re8yofIHOxyUx9eyDf0atfpj52mYA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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