Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8324af11daead1c1f07df44aa875a889e7b6c939d20b4aee787fe53d9b82da72' 
  AND token = '6rsol+a7kbTqwQ5qSCvU1q3HXpqFnO8ylTBxPly86do=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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