Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c37f8d81220d7996d55680e2a40b06b568799c5fa73a308c3ee54cbb918f13b' 
  AND token = 'L1pK7fpmMKQnK+hwcrvVIXVKyIIhVPLP1xW0c3f3aKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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