Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1d85dfdedbde4711b473c2be0b39f314b0c8b7b9f3671c33b4170019df64efc' 
  AND token = 'if0Tc64C2+Ywp4ximrnBV5DrfhBagx01H3/r+XyGF8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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