SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4f062f104365598b9bae85d607db0640862ef0cb3f2408af8620295b442f5a35' 
  AND token = 'tE5CGt7Z33wJWF6jWPRrR4o/bOOBkvMSnXDqoApWA1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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