SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '98fb0c4fb9ef75f148e8848bc6aa6e91163696b9e9581a67d5af0993d1b3243b' 
  AND token = 'tJVTvXx7HyS7GqlFO6R8x/oIaQVCvFL/ws3moqDZGv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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