Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ea8eaef6cedd1ad64f434865b7ab73bedefcf4b9e21a5e534ed23da680eb80e' 
  AND token = '924R61ttoT37BPIAKjhaun1aaYckN6DQuZPBnjaWAFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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