Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8cd8ad86f7931fd8f8ad9f2767358f7d518e823e4d294a5a16150390b34d9fc8' 
  AND token = 'nOMD+27mh941ZDbActJzoaaHdh6txtGqiF14UN0QSKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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