SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '098871ca31b1d086d2d6107254cc82c0cb0e560199942084c1b43f62b7550669' 
  AND token = 'B0KWXhBaSBGwQuPt0WvjY14Lgqn4GDf0mXyjNXp1xpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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