SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4594e29b9412df21cf35926467c1d6c25310b8801c2a63583dd7f12c12f57db9' 
  AND token = 'tXo6MPP5YZwyKSPvZP2efKo7nBsWzzCDLyOn5HBchhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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