Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4550d1b3464a65e0a345626b5d935e51547c671c3ff86e9d785475bf9861114' 
  AND token = 'ZGBQhzP1h9+mHpb9vxOvvitHAl8a5UpSDsJIbk1CmD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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