Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e5d6fe02c4815bd17795b905666d316f9d23449dd225bbc24be6cd2dd94854b' 
  AND token = 'KwVxRwwJD6X/VHFxuElD1uscHw4m+AazE88HSF3WyYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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