Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6e707a42addd403729f4088248c2dd5455e6fff8e8e982bcae10bb6b652e8f9' 
  AND token = 'bwVLVPPXubyX0PPEILpIfStliS68dbGVfzm6KY9F8og=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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