Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62e29adcd8cf1c00fd9b885425aac79c760ca195927a337db9430b2f2bd7da2f' 
  AND token = 'JFrsdt/jpgeOR/CTcCAWJFw4T+vKJv/FWoot5Vfrzlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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