Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21b82aebbedc4ea270e12978b5c8125f77f12e37702e191d07fdbebb7260149d' 
  AND token = 'WuNaQ9+zMrs6CM/GDmu0+WlKY4WkCPSw3jxoy/ooMpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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