SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2a7c083141cf9b5f812f43a6dc1bf8264d55d94418568837a871570b7887fe9b' 
  AND token = 'lsuguM9YepqhrX7FO0pf/26GlMq2U06Z5ogiX1JpfLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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