SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b9bae0456e1d42a83d5f8f95ce20e3a47239a25d2bcc97e3b83e3b35420fc6d6' 
  AND token = 'zzyh4uP0/k2o3zsfR6Qdt9QK+GCoiAqZuaoVjiLavdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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