Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2d479cc92c6d5eab910816ead6c827726630ac89b9f346f5047546fee628b2b' 
  AND token = 'ZBpzuaNteqHI3apMKPfsFJbr3phnh70Wn4459L42XYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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