SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a31d60c34706b17f4835902b43a45fbf2b9c9ca8010cc1339108ec08f47728f2' 
  AND token = 'LBeQVAlP/blHNrJK8wJxcu8FQCTzdY4YWBIZ4ncptOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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