Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0606478d2b5e57e840b696faa756f63096860885a7fc8597d0251159bdc04573' 
  AND token = 'XmbV5Zt3aI5/8e16h3ztvAh8LcNeR5TzFgjwXnlZ0b0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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