Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '977a02f333f06e2e49227fe0aae4d4343ab35ed8b40628d9efb821756c1c7277' 
  AND token = 'GENh7xQR0s90+CBD99DO8TSE3ZM36Vb2lMseTbDJtg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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