Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '02c0e8289c95c83c7dfc8d1537b0dbae1621f5e9d8d732672535d162cdfbe8c8' 
  AND token = 'LZyDSgvOM4mbH19CoU1YzJ+yUnbrYbE0oTB1L3ihXcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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