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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a013e01f6fea35717c328c954b8f6ffcac849db5ca15ff1cecef176ffd3dc132' 
  AND token = 'h3MgnhvqwZOlwuCQA+QUbMwMWfG8qazo6S6Yxkwe3No=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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