Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3928006aee917964d8776038c4db072c64fa2462381ae94d790a83b7008b32d2' 
  AND token = 'NfY0+guYCMTaFswp0G4Rd/0GNKT9JyGJKuN6VhnDFzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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