SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5ddb031ae35f1d8a8d8e9c0c7b463828169bf3b5f7beaab2e9a99fa560d15146' 
  AND token = 'IvtfflzKBx0uJHPgy1i7/Hx7mfKxrjqVtEF4MCOpTk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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