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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5083c913e9e0d068f68d32334cc065f74419e159c94039998e1cd0567a9864f' 
  AND token = 'rXdDiyoWfKh31uU7BnLce7dfIJItWbEd9fZOuOEkvwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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