Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01a4a550a6032266d361c8c243c8bc897578cc087dc8de1849d824131d1ea79b' 
  AND token = 'JuZNh+m+knEST9zrOC+FGfQU0u1yD78qllOBYvTdqi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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