Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3ac0212085b500cb189892c321b1ce52e78ebdf56d1de037b9e72b9c0bdd774' 
  AND token = 'sHHhyeutCMs0djSpNdnptiyEUMRQieamaKSVqeQvxTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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