SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d4ced9e04b814d3316e79fd7750db97787688f11046954a96be1e499fe50687' 
  AND token = 'F3I4ZMQLM6ylyXgmigYisMC/WoyJqeYjHVtcuZCXwV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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