Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78670f42cf0e2a82dabdb6247b8dab1e5c87972a36472cfe3b3a3a9cd21739ea' 
  AND token = 'oHv0wXnyxI1l+YSOGigm+ffoMobWPlyUAP3p3LJiPaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}