Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2d9dd765450d079d12d45920f0314540ed279eedc561c4db571452e8a719b4e' 
  AND token = '3BVTc28+oHFwC2nNrJ0Mwv0W26b2Ls4FnKHTc87C1Mo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}