Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '619abbaa8895a941ffa31c2425c8dad6b173e63516286bcaf461afacb7c80a4c' 
  AND token = '/IcHOQyI7Y/17G7+bxNl23enLp3OsaEdlUjmOb63n3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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