Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a23e34e3e8ced81319811f29b6e709e582ceef37209da98eb065341b8321b09d' 
  AND token = 'A/vdDY/UAMS6jdNWUECcUyIIQ+B8JW0ekc5WUHigLIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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