Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '683e11d2d00340e7c8c0b791f6fd0bd2ea89fc868894e229a99908cfe59954f8' 
  AND token = 'TTMKylrQDrn2ui9MreS8kzE/SNYsmYWgAo2atNwGluQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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