Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94c3fb4123b70f02cdec37dbe22d346ed6d732ee6d781568823504ccb9a88c77' 
  AND token = 'IPF+VEXbOYJcApi5mufRqiGfVyMXxseiZw9MJN7fKcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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