Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4588cea66d5132ed04c2cc9fbd6bfde253d02bee9852aca6e5346534f6b76ae6' 
  AND token = 'iXjxV9Li7e2hvsW/4vdqpGhRIevR0tOSwik7XomTdbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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