Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32b41b5b8e67c83daff64e43ad7db3e4a5f28ff78b26a967e90fa1500e67ce70' 
  AND token = '317l6MMbwImjAYD/dH+GT40yOxwGbrwJhUry7RAJ3Qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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