SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e801dd127b8f2145154d690521f0013384b82d8ca57fc79ca1ca743e9b1cbbf' 
  AND token = 'VmYMG9D5TFD0n5LF5lorHCAB56eBiakWGrgKzWT/V1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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