Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5abc962c0a6f9018a95979dab569e07b8f10c7490a2055ad44e30eb366c4fbfd' 
  AND token = '6Dj2mryAteoa0XOsHqSk5+KNxZ7pbfwZjcV/iPLBM1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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