SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32c0091de908dc2cd0c1f85f5e81a7e741333e4abe61287a42dd04e8aa9342ba' 
  AND token = 'fOrDVRGPHmClVCxNFUHxl7zaOqZLPhRNNUnAsmu+nRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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