Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0703ee2c35154d4a21f392a975e11f427276790d92459deba40fdb00ad9a6166' 
  AND token = 'Z3z6VN50G50wz+tAFmGwL+4+RAe3WNRBL7aMqjbxBUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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